Climate at a Glance

Statewide Rankings

Look up monthly rankings for 1-12, 18, 24, 36, 48, and 60-month time periods using the options below. Data and statistics are as of October 2021. For more information, please see Climatological Rankings.


Delaware

Average Temperature Rankings, September 2021

View Period (Months):All1234567891011121824364860
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  • Top 1/10
  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2021)
Warmest/Coolest
Since
Record
September 2021
1-Month
70.9°F
(21.6°C)
67.4°F
(19.7°C)
3.5°F
(1.9°C)
114th Coolest Coolest since: 2020 1917
14th Warmest Warmest since: 2019 2018
Ties: 1970, 1980
Aug–Sep 2021
2-Month
74.2°F
(23.4°C)
70.5°F
(21.4°C)
3.7°F
(2.0°C)
123rd Coolest Coolest since: 2020 1927, 1963
5th Warmest Warmest since: 2018 2018
Ties: 2010
Jul–Sep 2021
3-Month
75.6°F
(24.2°C)
72.2°F
(22.3°C)
3.4°F
(1.9°C)
120th Coolest Coolest since: 2017 1909
8th Warmest Warmest since: 2020 2016
Ties: 2011
Jun–Sep 2021
4-Month
75.3°F
(24.1°C)
71.8°F
(22.1°C)
3.5°F
(2.0°C)
123rd Coolest Coolest since: 2020 1927
5th Warmest Warmest since: 2020 2010
Ties: 2011, 2020
May–Sep 2021
5-Month
73.0°F
(22.8°C)
69.9°F
(21.1°C)
3.1°F
(1.7°C)
121st Coolest Coolest since: 2020 1924, 1927
7th Warmest Warmest since: 2019 2010
Apr–Sep 2021
6-Month
70.1°F
(21.2°C)
67.0°F
(19.4°C)
3.1°F
(1.8°C)
122nd Coolest Coolest since: 2020 1907
6th Warmest Warmest since: 2019 2010
Mar–Sep 2021
7-Month
66.9°F
(19.4°C)
63.4°F
(17.4°C)
3.5°F
(2.0°C)
124th Coolest Coolest since: 2020 1924
4th Warmest Warmest since: 2019 2010
Ties: 2011
Feb–Sep 2021
8-Month
63.1°F
(17.3°C)
59.8°F
(15.4°C)
3.3°F
(1.9°C)
118th Coolest Coolest since: 2015 1907
10th Warmest Warmest since: 2020 2012
Jan–Sep 2021
9-Month
60.2°F
(15.7°C)
56.9°F
(13.8°C)
3.3°F
(1.9°C)
120th Coolest Coolest since: 2018 1940
8th Warmest Warmest since: 2020 2012
Dec 2020–Sep 2021
10-Month
58.1°F
(14.5°C)
54.8°F
(12.7°C)
3.3°F
(1.8°C)
120th Coolest Coolest since: 2018 1904
7th Warmest Warmest since: 2020 2012
Ties: 1991, 1998
Nov 2020–Sep 2021
11-Month
57.6°F
(14.2°C)
54.0°F
(12.2°C)
3.6°F
(2.0°C)
123rd Coolest Coolest since: 2020 1904
4th Warmest Warmest since: 2017 2012
Ties: 2017
Oct 2020–Sep 2021
12-Month
57.8°F
(14.3°C)
54.2°F
(12.3°C)
3.6°F
(2.0°C)
123rd Coolest Coolest since: 2020 1904
4th Warmest Warmest since: 2017 2012
Ties: 2017
Apr 2020–Sep 2021
18-Month
61.6°F
(16.4°C)
58.5°F
(14.7°C)
3.1°F
(1.7°C)
121st Coolest Coolest since: 2018 1904, 1918
6th Warmest Warmest since: 2020 2012
Oct 2019–Sep 2021
24-Month
57.7°F
(14.3°C)
54.2°F
(12.3°C)
3.5°F
(2.0°C)
124th Coolest Coolest since: 2020 1905
2nd Warmest Warmest since: 2017 2017
Oct 2018–Sep 2021
36-Month
57.7°F
(14.3°C)
54.2°F
(12.3°C)
3.5°F
(2.0°C)
124th Coolest Coolest since: 2020 1905, 1918
1st Warmest Warmest since: 2018 2018, 2021
Ties: 2018
Oct 2017–Sep 2021
48-Month
57.5°F
(14.2°C)
54.1°F
(12.3°C)
3.4°F
(1.9°C)
122nd Coolest Coolest since: 2020 1905
2nd Warmest Warmest since: 2020 2019
Ties: 2020
Oct 2016–Sep 2021
60-Month
57.6°F
(14.2°C)
54.2°F
(12.3°C)
3.4°F
(1.9°C)
121st Coolest Coolest since: 2019 1908
2nd Warmest Warmest since: 2020 2020

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published November 2021, retrieved on December 5, 2021 from https://www.ncdc.noaa.gov/cag/